Subaru 2002 IMPREZA Service Manual page 328

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DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)

ENGINE (DIAGNOSTICS)

Repair poor con-

tact in mass air

flow sensor con-

CHECK HARNESS BETWEEN ECM AND

MASS AIR FLOW SENSOR CONNECTOR

Measure the resistance of harness between

ECM and chassis ground.

Connector & terminal

(884) No. 13

Chassis ground:

(8135) No. 27

Chassis ground:

( 8 135) No. 19

Chassis ground:

CHECK POOR CONTACT

Check poor contact in mass air flow sensor

Replace the mass

air flow and intake

air temperature

sensor. <Ref. to

TURBO)-34, Mass

Air Flow and

Intake Air Temper-

ature Sensor.>

Is the resistance more than

Is there poor contact in mass

air flow sensor connector?

short circuit

between ECM and

mass air flow sen-

sor connector.

EN(D0HC TURBO)-104

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